<template>
  <div>
    <div style="display: inline-block">
      <span v-for="(item, index) in arr" :key="index">
        <input type="checkbox" :value="item" v-model="list" />
        <span>{{ item }}</span>
      </span>
    </div>
    <p>你选中的元素, 累加的值和为: {{ total }}</p>
  </div>
</template>

<script>
export default {
  data () {
    return {
      arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      list: []
    }
  },
  computed: {
    total () {
      return this.list.reduce((prev, item) => prev + item, 0)
    }
  }
}
</script>

<style></style>
